Vol. 134

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2012-11-24

Link Budget of Magnetic Antennas for Ingestible Capsule at 40 MHz

By Fatiha El Hatmi, Marjorie Grzeskowiak, Stephane Protat, and Odile Picon
Progress In Electromagnetics Research, Vol. 134, 111-131, 2013
doi:10.2528/PIER12081205

Abstract

Magnetic antennas are suitable in short range medical in-body applications because they are less perturbed in the presence of the human tissues comparing to electrical antennas. After a preliminary study on magnetic antennas designed separately at 40 MHz with a matching system, a link budget between a spiral coil ingestible capsule transmitter antenna and a square coil onbody receiver antenna has been established in the presence of the human body. The efficiency (ratio of received power to transmitted power) of the magnetic induction link through a homogeneous human body (muscle) is equal to 0.6 % when the TX (transmitter) capsule is in front of the RX (receiver) antenna. If the transmission channel is a three-layered human body (muscle / fat / skin) the performances of the inductive link can be enhanced and the efficiency reaches 0.8 %. These performances can be improved (up to 1 %) when the dimensions of the receiver antenna increase. Consequently, the power consumption can be reduced and hence the battery life of the wireless capsule increases. Additionally, when the TX antenna is located randomly at an arbitrary orientation and position, the efficiency of the magnetic induction link can be improved by orienting the RX antenna parallel and perpendicularly to the human body surface.

Citation


Fatiha El Hatmi, Marjorie Grzeskowiak, Stephane Protat, and Odile Picon, "Link Budget of Magnetic Antennas for Ingestible Capsule at 40 MHz ," Progress In Electromagnetics Research, Vol. 134, 111-131, 2013.
doi:10.2528/PIER12081205
http://www.jpier.org/PIER/pier.php?paper=12081205

References


    1. Yan, G., B. Huang, and P. Zan, "Design of battery-less and real-time telemetry system for gastrointestinal applications," IEEE International Conference on Control and Automation, 245-249, May 30-Jun. 1, 2007.

    2. Aydin, N., T. Arslan, and D. R. S. Cumming, "Design and implementation of a spread spectrum based communication system for an ingestible capsule," Biomedical Engineering Society EMBS/BMES Conference, Vol. 2, 1773-1774, 2002.

    3. Kim, Y., et al., "Pressure monitoring system in gastro-intestinal tract," Proceedings of the IEEE International Conference on Robotics and Automation , 1321-1326, Apr. 18-22, 2005.

    4. Wang, L., T. D. Drysdale, and D. R. S. Cumming, "In situcharacterization of two wireless transmission schemes for ingestible capsules," IEEE Transactions on Biomedical Engineering, 2020-2027, Nov. 2007.

    5. Zhao, D., X. Hou, X. Wang, and C. Peng, "Miniaturization design of the antenna for wireless capsule endoscope," 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE), 1-4, 2010.
    doi:10.1109/ICBBE.2010.5515307

    6. Izdebski, P. M., H. Rajagopalan, and Y. Rahmat-Samii, "Conformal ingestible capsule antenna: A novel chandelier meandered design," IEEE Transactions on Antennas and Propagation, 900-909, Apr. 2009.
    doi:10.1109/TAP.2009.2014598

    7. Kwak, S. I., K. Chang, and Y. J. Yoon, "Small spiral antenna for wideband capsule endoscope system," Electronics Letters, Vol. 42, 1328-1329, Nov. 9, 2006.
    doi:10.1049/el:20062074

    8. Tikka, A. C., M. Faulkner, and S. Al-Sarawi, "Secure wireless powering and interrogation of an implantable microvalve," IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS), 35-38, Jan. 16-19, 2011.

    9. Agbinya, J. I., et al., "Size and characteristics of the `cone of silence' in near-field magnetic induction communications," Journal of Battlefield Technology, Vol. 13, No. 1, Mar. 2010.

    10. Rajagopalan, H. and Y. Rahmat-Samii, "Link budget analysis and characterization for ingestible capsule antenna," International Workshop on Antenna Technology (iWAT), 1-4, Mar. 1-3, 2010.

    11. Yahya, R.-S. and K. Jaehoon, Implanted Antennas in Medical Wireless Communications, 1st Edition, Morgan & Claypool Publishers' Series, Ed., USA, 2006.

    12. , , , Dielectric Properties of Human Tissues [on line] available: niremf.ifac.cnr.it/docs/DIELECTRIC/AppendixC.html#FF.

    13. Finkenzeller, K., RFID Handbook: Radio-frequency Identification Fundamentals and Application. , 2nd Edition, Wiley, 2003.
    doi:10.1109/IB2COM.2010.5723607

    14. Agbinya, J. I. and M. Masihpour, "Near field magnetic induction communication link budget: Agbinya-Masihpour model," Fifth International Conference on Broadband and Biomedical Communications (IB2Com), 1-6, 2010.
    doi:10.1109/TAP.2011.2163763

    15. Merli, F., et al., "Design, realization and measurements of a miniature antenna for implantable wireless communication systems," IEEE Transactions on Antennas and Propagation, Vol. 59, No. 10, 3544-3555, Oct. 2011.
    doi:10.1109/EUMC.2008.4751479

    16. Hennig, A., "RF energy transmission for sensor transponders deeply implanted in human bodies," 38th Microwave Conference EuMC, 424-427, 2008.